diff --git a/coreapi/chat.c b/coreapi/chat.c
index daf9b7bb6..b453892eb 100644
--- a/coreapi/chat.c
+++ b/coreapi/chat.c
@@ -138,6 +138,7 @@ LinphoneChatRoom * linphone_core_create_client_group_chat_room(LinphoneCore *lc,
 LinphoneChatRoom *_linphone_core_join_client_group_chat_room (LinphoneCore *lc, const LinphonePrivate::Address &addr) {
 	LinphoneChatRoom *cr = _linphone_client_group_chat_room_new(lc, addr.asString().c_str(), nullptr);
 	L_GET_CPP_PTR_FROM_C_OBJECT(cr)->join();
+	_linphone_core_add_group_chat_room(lc, L_GET_CPP_PTR_FROM_C_OBJECT(cr)->getConferenceAddress()->asStringUriOnly().c_str(), linphone_chat_room_ref(cr));
 	lc->chatrooms = bctbx_list_append(lc->chatrooms, cr);
 	return cr;
 }
diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 4948d1d5f..7dedc0672 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -45,6 +45,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "mediastreamer2/msjpegwriter.h"
 #include "mediastreamer2/msogl.h"
 #include "mediastreamer2/msvolume.h"
+#include "chat/client-group-chat-room-p.h"
 #include "conference/remote-conference-event-handler.h"
 
 // For migration purpose.
@@ -2115,11 +2116,13 @@ static void linphone_core_internal_notify_received(LinphoneCore *lc, LinphoneEve
 			ms_message("Notify presence for list %p", list);
 			linphone_friend_list_notify_presence_received(list, lev, body);
 		}
-	} else if (strcmp(notified_event, "Conference") == 0) {
-		LinphonePrivate::RemoteConferenceEventHandler *handler =
-			reinterpret_cast<LinphonePrivate::RemoteConferenceEventHandler *>(linphone_event_get_user_data(lev));
-		if (handler)
-			handler->notifyReceived(reinterpret_cast<char *>(linphone_content_get_buffer(body)));
+	} else if (strcmp(notified_event, "conference") == 0) {
+		const LinphoneAddress *resource = linphone_event_get_resource(lev);
+		char *resourceUri = linphone_address_as_string_uri_only(resource);
+		LinphoneChatRoom *cr = _linphone_core_find_group_chat_room(lc, resourceUri);
+		bctbx_free(resourceUri);
+		if (cr)
+			L_GET_PRIVATE_FROM_C_OBJECT(cr, ClientGroupChatRoom)->notifyReceived(linphone_content_get_string_buffer(body));
 	}
 }
 
@@ -2251,6 +2254,7 @@ static void linphone_core_init(LinphoneCore * lc, LinphoneCoreCbs *cbs, LpConfig
 		linphone_configuring_terminated(lc, LinphoneConfiguringSkipped, NULL);
 	} // else linphone_core_start will be called after the remote provisioning (see linphone_core_iterate)
 	lc->bw_controller = ms_bandwidth_controller_new();
+	lc->group_chat_rooms = bctbx_mmap_cchar_new();
 }
 
 LinphoneCore *_linphone_core_new_with_config(LinphoneCoreCbs *cbs, struct _LpConfig *config, void *userdata) {
@@ -5946,6 +5950,8 @@ static void linphone_core_uninit(LinphoneCore *lc)
 	}
 
 	lc->chatrooms = bctbx_list_free_with_data(lc->chatrooms, (MSIterateFunc)linphone_chat_room_release);
+	if (lc->group_chat_rooms)
+		bctbx_mmap_cchar_delete_with_data(lc->group_chat_rooms, (void (*)(void *))linphone_chat_room_unref);
 
 	linphone_core_set_state(lc,LinphoneGlobalShutdown,"Shutting down");
 #ifdef VIDEO_ENABLED
@@ -7077,6 +7083,32 @@ const char * linphone_core_get_conference_factory_uri(const LinphoneCore *lc) {
 	return lp_config_get_string(linphone_core_get_config(lc), "misc", "conference_factory_uri", nullptr);
 }
 
+bool_t _linphone_core_has_group_chat_room(const LinphoneCore *lc, const char *id) {
+	bool_t result;
+	bctbx_iterator_t *it = bctbx_map_cchar_find_key(lc->group_chat_rooms, id);
+	bctbx_iterator_t *endit = bctbx_map_cchar_end(lc->group_chat_rooms);
+	result = !bctbx_iterator_cchar_equals(it, endit);
+	bctbx_iterator_cchar_delete(endit);
+	bctbx_iterator_cchar_delete(it);
+	return result;
+}
+
+void _linphone_core_add_group_chat_room(LinphoneCore *lc, const char *id, LinphoneChatRoom *cr) {
+	bctbx_pair_t *pair = reinterpret_cast<bctbx_pair_t *>(bctbx_pair_cchar_new(id, linphone_chat_room_ref(cr)));
+	bctbx_map_cchar_insert_and_delete(lc->group_chat_rooms, pair);
+}
+
+LinphoneChatRoom *_linphone_core_find_group_chat_room(const LinphoneCore *lc, const char *id) {
+	LinphoneChatRoom *result = nullptr;
+	bctbx_iterator_t *it = bctbx_map_cchar_find_key(lc->group_chat_rooms, id);
+	bctbx_iterator_t *endit = bctbx_map_cchar_end(lc->group_chat_rooms);
+	if (!bctbx_iterator_cchar_equals(it, endit))
+		result = reinterpret_cast<LinphoneChatRoom *>(bctbx_pair_cchar_get_second(bctbx_iterator_cchar_get_pair(it)));
+	bctbx_iterator_cchar_delete(endit);
+	bctbx_iterator_cchar_delete(it);
+	return result;
+}
+
 void linphone_core_set_tls_cert(LinphoneCore *lc, const char *tls_cert) {
 	if (lc->tls_cert) {
 		ms_free(lc->tls_cert);
diff --git a/coreapi/private.h b/coreapi/private.h
index 31bbda276..74a551576 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -449,6 +449,8 @@ bool_t linphone_core_incompatible_security(LinphoneCore *lc, SalMediaDescription
 extern LinphonePrivate::Sal::Callbacks linphone_sal_callbacks;
 LINPHONE_PUBLIC bool_t linphone_core_rtcp_enabled(const LinphoneCore *lc);
 LINPHONE_PUBLIC bool_t linphone_core_symmetric_rtp_enabled(LinphoneCore*lc);
+bool_t _linphone_core_has_group_chat_room(const LinphoneCore *lc, const char *id);
+void _linphone_core_add_group_chat_room(LinphoneCore *lc, const char *id, LinphoneChatRoom *cr);
 
 void linphone_core_queue_task(LinphoneCore *lc, belle_sip_source_func_t task_fun, void *data, const char *task_description);
 
@@ -832,6 +834,7 @@ struct _LinphoneCore
 	MSList *queued_calls;	/* used by the autoreplier */
 	MSList *call_logs;
 	MSList *chatrooms;
+	bctbx_map_t *group_chat_rooms;
 	int max_call_logs;
 	int missed_calls;
 	VideoPreview *previewstream;
diff --git a/coreapi/tester_utils.h b/coreapi/tester_utils.h
index ccb993246..0431d80de 100644
--- a/coreapi/tester_utils.h
+++ b/coreapi/tester_utils.h
@@ -94,6 +94,7 @@ LINPHONE_PUBLIC mblk_t *_linphone_call_stats_get_received_rtcp (const LinphoneCa
 LINPHONE_PUBLIC LinphoneQualityReporting *linphone_call_log_get_quality_reporting(LinphoneCallLog *call_log);
 LINPHONE_PUBLIC reporting_session_report_t **linphone_quality_reporting_get_reports(LinphoneQualityReporting *qreporting);
 
+LINPHONE_PUBLIC LinphoneChatRoom *_linphone_core_find_group_chat_room(const LinphoneCore *lc, const char *id);
 LINPHONE_PUBLIC bctbx_list_t * linphone_chat_room_get_transient_messages(const LinphoneChatRoom *cr);
 
 LINPHONE_PUBLIC MSList* linphone_core_fetch_friends_from_db(LinphoneCore *lc, LinphoneFriendList *list);
diff --git a/src/chat/client-group-chat-room-p.h b/src/chat/client-group-chat-room-p.h
index 7bc90bac5..54e8f9b60 100644
--- a/src/chat/client-group-chat-room-p.h
+++ b/src/chat/client-group-chat-room-p.h
@@ -38,6 +38,7 @@ public:
 	virtual ~ClientGroupChatRoomPrivate () = default;
 
 	std::shared_ptr<CallSession> createSession ();
+	void notifyReceived (std::string body);
 
 private:
 	L_DECLARE_PUBLIC(ClientGroupChatRoom);
diff --git a/src/chat/client-group-chat-room.cpp b/src/chat/client-group-chat-room.cpp
index 3b98f9448..b5637602b 100644
--- a/src/chat/client-group-chat-room.cpp
+++ b/src/chat/client-group-chat-room.cpp
@@ -50,6 +50,11 @@ shared_ptr<CallSession> ClientGroupChatRoomPrivate::createSession () {
 	return session;
 }
 
+void ClientGroupChatRoomPrivate::notifyReceived (string body) {
+	L_Q();
+	q->eventHandler->notifyReceived(body);
+}
+
 // =============================================================================
 
 ClientGroupChatRoom::ClientGroupChatRoom (LinphoneCore *core, const Address &me, const string &uri, const string &subject)
@@ -169,6 +174,7 @@ void ClientGroupChatRoom::onConferenceCreated (const Address &addr) {
 	L_D();
 	conferenceAddress = addr;
 	d->setState(ChatRoom::State::Created);
+	_linphone_core_add_group_chat_room(d->core, addr.asStringUriOnly().c_str(), L_GET_C_BACK_PTR(this));
 }
 
 void ClientGroupChatRoom::onConferenceTerminated (const Address &addr) {
diff --git a/src/conference/conference.cpp b/src/conference/conference.cpp
index 9794b706c..2b271e2d1 100644
--- a/src/conference/conference.cpp
+++ b/src/conference/conference.cpp
@@ -189,9 +189,11 @@ shared_ptr<Participant> Conference::findParticipant (const shared_ptr<const Call
 }
 
 bool Conference::isMe (const Address &addr) const {
-	Address cleanedAddress = me->getAddress();
-	cleanedAddress.setPort(0);
-	return addr.equal(cleanedAddress);
+	Address cleanedMe = me->getAddress();
+	cleanedMe.setPort(0);
+	Address cleanedAddr = addr;
+	cleanedAddr.setPort(0);
+	return cleanedAddr.equal(cleanedMe);
 }
 
 LINPHONE_END_NAMESPACE
diff --git a/src/conference/conference.h b/src/conference/conference.h
index 1d30d0b80..57a4cdb44 100644
--- a/src/conference/conference.h
+++ b/src/conference/conference.h
@@ -46,6 +46,9 @@ public:
 
 	LinphoneCore * getCore () const { return core; }
 
+	std::shared_ptr<Participant> findParticipant (const Address &addr) const;
+	std::shared_ptr<Participant> findParticipant (const std::shared_ptr<const CallSession> &session) const;
+
 public:
 	/* ConferenceInterface */
 	void addParticipant (const Address &addr, const CallSessionParams *params, bool hasMedia) override;
@@ -81,8 +84,6 @@ private:
 protected:
 	explicit Conference (LinphoneCore *core, const Address &myAddress, CallListener *listener = nullptr);
 
-	std::shared_ptr<Participant> findParticipant (const Address &addr) const;
-	std::shared_ptr<Participant> findParticipant (const std::shared_ptr<const CallSession> &session) const;
 	bool isMe (const Address &addr) const ;
 
 protected:
diff --git a/src/conference/local-conference-event-handler.cpp b/src/conference/local-conference-event-handler.cpp
index 8d5896229..2e216e5c2 100644
--- a/src/conference/local-conference-event-handler.cpp
+++ b/src/conference/local-conference-event-handler.cpp
@@ -18,7 +18,7 @@
  */
 
 #include "conference/local-conference.h"
-#include "conference/participant.h"
+#include "conference/participant-p.h"
 #include "local-conference-event-handler.h"
 #include "object/object-p.h"
 
@@ -78,15 +78,15 @@ void LocalConferenceEventHandlerPrivate::notifyFullState (string notify, Linphon
 
 void LocalConferenceEventHandlerPrivate::notifyAllExcept (string notify, const Address &addr) {
 	for (const auto &participant : conf->getParticipants()) {
-		if (addr != participant->getAddress()) {
-			this->sendNotify(notify, addr);
-		}
+		if (participant->getPrivate()->isSubscribedToConferenceEventPackage() && (addr != participant->getAddress()))
+			sendNotify(notify, addr);
 	}
 }
 
 void LocalConferenceEventHandlerPrivate::notifyAll (string notify) {
 	for (const auto &participant : conf->getParticipants()) {
-		this->sendNotify(notify, participant->getAddress());
+		if (participant->getPrivate()->isSubscribedToConferenceEventPackage())
+			sendNotify(notify, participant->getAddress());
 	}
 }
 
@@ -199,7 +199,17 @@ LocalConferenceEventHandler::~LocalConferenceEventHandler () {
 
 void LocalConferenceEventHandler::subscribeReceived (LinphoneEvent *lev) {
 	L_D();
-	d->notifyFullState(d->createNotifyFullState(), lev);
+	const LinphoneAddress *lAddr = linphone_event_get_from(lev);
+	char *addrStr = linphone_address_as_string(lAddr);
+	shared_ptr<Participant> participant = d->conf->findParticipant(Address(addrStr));
+	bctbx_free(addrStr);
+	if (participant) {
+		if (linphone_event_get_subscription_state(lev) == LinphoneSubscriptionActive) {
+			participant->getPrivate()->subscribeToConferenceEventPackage(true);
+			d->notifyFullState(d->createNotifyFullState(), lev);
+		} else if (linphone_event_get_subscription_state(lev) == LinphoneSubscriptionTerminated)
+			participant->getPrivate()->subscribeToConferenceEventPackage(false);
+	}
 }
 
 void LocalConferenceEventHandler::notifyParticipantAdded (const Address &addr) {
diff --git a/src/conference/participant-p.h b/src/conference/participant-p.h
index 363820f9b..f862c54a4 100644
--- a/src/conference/participant-p.h
+++ b/src/conference/participant-p.h
@@ -41,12 +41,15 @@ public:
 
 	std::shared_ptr<CallSession> createSession (const Conference &conference, const CallSessionParams *params, bool hasMedia, CallSessionListener *listener);
 	std::shared_ptr<CallSession> getSession () const { return session; }
+	bool isSubscribedToConferenceEventPackage () const { return _isSubscribedToConferenceEventPackage; }
+	void subscribeToConferenceEventPackage (bool value) { _isSubscribedToConferenceEventPackage = value; }
 	void removeSession () { session = nullptr; }
 	void setAddress (const Address &newAddr) { addr = newAddr; }
 
 private:
 	Address addr;
 	bool isAdmin = false;
+	bool _isSubscribedToConferenceEventPackage = false;
 	std::shared_ptr<CallSession> session;
 
 	L_DECLARE_PUBLIC(Participant);
diff --git a/src/conference/participant.h b/src/conference/participant.h
index dd5de40ad..7b092bb7f 100644
--- a/src/conference/participant.h
+++ b/src/conference/participant.h
@@ -39,6 +39,8 @@ class Participant : public Object {
 	friend class ClientGroupChatRoomPrivate;
 	friend class Conference;
 	friend class LocalConference;
+	friend class LocalConferenceEventHandler;
+	friend class LocalConferenceEventHandlerPrivate;
 	friend class MediaSessionPrivate;
 	friend class RemoteConference;